A step to the decentralized real-time timekeeping network

doi:10.1088/1674-1056/acfa88

中国物理B ›› 2024, Vol. 33 ›› Issue (1): 10702-10702.doi: 10.1088/1674-1056/acfa88

A step to the decentralized real-time timekeeping network

Fangmin Wang(王芳敏)^1,2, Yufeng Chen(陈雨锋)^1,2, Jianhua Zhou(周建华)³, Yuting Lin(蔺玉亭)³, Jun Yang(杨军)⁴, Bo Wang(王波)^1,2,†, and Lijun Wang(王力军)^1,2

1 State Key Laboratory of Precision Space-time Information Sensing Technology, Department of Precision Instrument, Tsinghua University, Beijing 100084, China;
2 Key Laboratory of Photonic Control Technology(Ministry of Education), Tsinghua University, Beijing 100084, China;
3 Beijing Satellite Navigation Center, Beijing 100094, China;
4 Beijing Institute of Radio Metrology and Measurement, Beijing 100854, China

收稿日期:2023-07-19 修回日期:2023-09-08 接受日期:2023-09-18 出版日期:2023-12-13 发布日期:2023-12-28
通讯作者: Bo Wang E-mail:bo.wang@tsinghua.edu.cn
基金资助:
This work was supported in part by the National Natural Science Foundation of China (Grant No. 61971259), the National Key R&D Program of China (Grant No. 2021YFA1402102), and Tsinghua University Initiative Scientific Research Program.

A step to the decentralized real-time timekeeping network

Fangmin Wang(王芳敏)^1,2, Yufeng Chen(陈雨锋)^1,2, Jianhua Zhou(周建华)³, Yuting Lin(蔺玉亭)³, Jun Yang(杨军)⁴, Bo Wang(王波)^1,2,†, and Lijun Wang(王力军)^1,2

1 State Key Laboratory of Precision Space-time Information Sensing Technology, Department of Precision Instrument, Tsinghua University, Beijing 100084, China;
2 Key Laboratory of Photonic Control Technology(Ministry of Education), Tsinghua University, Beijing 100084, China;
3 Beijing Satellite Navigation Center, Beijing 100094, China;
4 Beijing Institute of Radio Metrology and Measurement, Beijing 100854, China

Received:2023-07-19 Revised:2023-09-08 Accepted:2023-09-18 Online:2023-12-13 Published:2023-12-28
Contact: Bo Wang E-mail:bo.wang@tsinghua.edu.cn
Supported by:
This work was supported in part by the National Natural Science Foundation of China (Grant No. 61971259), the National Key R&D Program of China (Grant No. 2021YFA1402102), and Tsinghua University Initiative Scientific Research Program.

摘要/Abstract

摘要： The composite time scale (CTS) provides an accurate and stable time-frequency reference for modern science and technology. Conventional CTS always features a centralized network topology, which means that the CTS is accompanied by a local master clock. This largely restricts the stability and reliability of the CTS. We simulate the restriction and analyze the influence of the master clock on the CTS. It proves that the CTS's long-term stability is also positively related to that of the master clock, until the region dominated by the frequency drift of the H-maser (averaging time longer than ～10⁵ s). Aiming at this restriction, a real-time clock network is utilized. Based on the network, a real-time CTS referenced by a stable remote master clock is achieved. The experiment comparing two real-time CTSs referenced by a local and a remote master clock respectively reveals that under open-loop steering, the stability of the CTS is improved by referencing to a remote and more stable master clock instead of a local and less stable master clock. In this way, with the help of the proposed scheme, the CTS can be referenced to the most stable master clock within the network in real time, no matter whether it is local or remote, making democratic polycentric timekeeping possible.

关键词: frequency synchronization network, composite time scale, frequency stability, democratic timekeeping

Abstract: The composite time scale (CTS) provides an accurate and stable time-frequency reference for modern science and technology. Conventional CTS always features a centralized network topology, which means that the CTS is accompanied by a local master clock. This largely restricts the stability and reliability of the CTS. We simulate the restriction and analyze the influence of the master clock on the CTS. It proves that the CTS's long-term stability is also positively related to that of the master clock, until the region dominated by the frequency drift of the H-maser (averaging time longer than ～10⁵ s). Aiming at this restriction, a real-time clock network is utilized. Based on the network, a real-time CTS referenced by a stable remote master clock is achieved. The experiment comparing two real-time CTSs referenced by a local and a remote master clock respectively reveals that under open-loop steering, the stability of the CTS is improved by referencing to a remote and more stable master clock instead of a local and less stable master clock. In this way, with the help of the proposed scheme, the CTS can be referenced to the most stable master clock within the network in real time, no matter whether it is local or remote, making democratic polycentric timekeeping possible.

Key words: frequency synchronization network, composite time scale, frequency stability, democratic timekeeping

中图分类号: (Time and frequency)

06.30.Ft

06.20.-f (Metrology)

Fangmin Wang(王芳敏), Yufeng Chen(陈雨锋), Jianhua Zhou(周建华), Yuting Lin(蔺玉亭), Jun Yang(杨军), Bo Wang(王波), and Lijun Wang(王力军). A step to the decentralized real-time timekeeping network[J]. 中国物理B, 2024, 33(1): 10702-10702.

参考文献

[1] Yang Y X, Mao Y and Sun B J 2020 Satell. Navig. 1 1
[2] Lévesque M and Tipper D 2016 IEEE Commun. Surv. Tutor. 18 2926
[3] McGrew W F, Zhang X, Fasano R J, Schaffer S A, Beloy K, Nicolodi D, Brown R C, Hinkley N, Milani G, Schioppo M, Yoon T H and Ludlow A D 2018 Nature 564 87
[4] Zhang Z H, Gong S P, Dimitrovski A D and Li H S 2013 IEEE Trans. Smart Grid 4 87
[5] Kolkowitz S, Pikovski I, Langellier N, Lukin M D, Walsworth, R L and Ye J 2016 Phys. Rev. D 94 124043
[6] Derevianko A and Pospelov M 2014 Nat. Phys. 10 933
[7] Galleani L and Tavella P 2010 IEEE Control Syst. Mag. 30 44
[8] Tavella P and Thomas C 1991 Metrologia 28 57
[9] Panfilo G and Arias F 2019 Metrologia 56 042001
[10] Parker T E and Levine J 1997 IEEE Trans. Ultrason. Ferroelectr. Freq. Control 44 1239
[11] Matsakis D 2005 Proceeding of IEEE International Frequency Control Symposium and Exposition, August 29-31, Vancouver, Canada, p. 217
[12] Ido T, Fujieda M, Hachisu H, Hayasaka K, Kajita M, Kumagai M, Li Y, Matsubara K, Nagano S, Ohtsubo N, Hanado Y and Hosokawa M 2017 The Science of Time 2016:Time in Astronomy & Society, Past, Present and Future (Cham:Springer) p. 151
[13] Zhang A M, Gao Y, Liang K, Wang W B, Yang Z Q, Ning D Y and Fang Z J 2013 Joint European Frequency and Time Forum & International Frequency Control Symposium, July 21-25, Prague, Czech Republic, p. 654
[14] Shemar S L, Davis J A and Whibberley P B 2010 EFTF-2010 24th European Frequency and Time Forum, April 13-16, Noordwijk, Netherlands, p. 1
[15] Dong S W 2003 Metrologia 40 S249
[16] Guo Y C, Wang B, Wang F M, Shi F F, Zhang A M, Zhu X, Yang J, Feng K M, Han C H, Li T C and Wang L J 2019 Metrologia 56 045003
[17] Marszalec M, Lusawa M, Czubla A and Lewandowski W 2013 Joint European Frequency and Time Forum & International Frequency Control Symposium, July 21-25, Prague, Czech Republic, p. 805
[18] Azoubib J, Nawrocki J and Lewandowski W 2003 Metrologia 40 S245
[19] Tavella P 2008 Metrologia 45 S183
[20] Panfilo G and Tavella P 2008 Metrologia 45 S108
[21] Zucca C and Tavella P 2005 IEEE Trans. Ultrason. Ferroelectr. Freq. Control 52 289
[22] Levine J 1999 Rev. Sci. Instrum. 70 2567
[23] Levine J 2012 Rev. Sci. Instrum. 83 021101
[24] Thomas C, Wolf P and Tavella P 1994 Time Scales BIPM Monographie 94 1
[25] Farina M, Galleani L, Tavella P and Bittanti S 2010 IEEE Trans. Ultrason. Ferroelectr. Freq. Control 57 2257
[26] Wang B, Gao C, Chen W L, Miao J, Zhu X, Bai Y, Zhang J W, Feng Y Y, Li T C and Wang L J 2012 Sci. Rep. 2 556
[27] Tavella P and Premoli A 1994 Metrologia 30 479
[28] Torcaso F, Ekstrom C R, Burt E A and Matsakis D N 2000 IEEE Trans. Ultrason. Ferroelectr. Freq. Control 47 1183

A step to the decentralized real-time timekeeping network

A step to the decentralized real-time timekeeping network

RichHTML

PDF (PC)

赞

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 8

Metrics

本文评价

推荐阅读 0

[1]	Mengyan Zeng(曾孟彦), Zixiao Ma(马子晓), Ruming Hu(胡如明), Baolin Zhang(张宝林), Yanmei Hao(郝艳梅), Huaqing Zhang(张华青), Yao Huang(黄垚), Hua Guan(管桦), and Kelin Gao(高克林). A combined magnetic field stabilization system for improving the stability of ⁴⁰Ca⁺ optical clock[J]. 中国物理B, 2023, 32(11): 110704-110704.
[2]	张宝林, 黄垚, 张华青, 郝艳梅, 曾孟彦, 管桦, 高克林. Progress on the ⁴⁰Ca⁺ ion optical clock[J]. 中国物理B, 2020, 29(7): 74209-074209.
[3]	于明圆, 孟艳玲, 叶美凤, 王鑫, 欧阳鑫川, 万金银, 肖玲, 成华东, 刘亮. Development of the integrated integrating sphere cold atom clock[J]. 中国物理B, 2019, 28(7): 70602-070602.
[4]	程鹏飞, 张建伟, 王力军. Ramsey-coherent population trapping Cs atomic clock based on lin\|\|lin optical pumping with dispersion detection[J]. 中国物理B, 2019, 28(7): 70601-070601.
[5]	潘冠中, 关宝璐, 徐晨, 李鹏涛, 杨嘉炜, 刘振杨. Broad bandwidth interference filter-stabilized external cavity diode laser with narrow linewidth below 100 kHz[J]. 中国物理B, 2018, 27(1): 14204-014204.
[6]	杜远博, 魏荣, 董日昌, 邹凡, 王育竹. Recent improvements on the atomic fountain clock at SIOM[J]. 中国物理B, 2015, 24(7): 70601-070601.
[7]	田原, 谭伯仲, 杨晶, 张奕, 顾思洪. Ramsey-CPT spectrum with the Faraday effect and its application to atomic clocks[J]. 中国物理B, 2015, 24(6): 63302-063302.
[8]	苏娟, 邓科, 郭等柱, 汪中, 陈兢, 张耿民, 陈徐宗. Stable ⁸⁵Rb micro vapour cells: fabrication based on anodic bonding and application in chip-scale atomic clocks[J]. 中国物理B, 2010, 19(11): 110701-113101.